Made From Strong 200# Test White Faced Cardboard. Holds 1 Standard 10.4mm CD Jewel Case. Extended Sides to Ensure Maximum Protection! Lock In Tab To Hold the Box Closed! 5-3/4" x 5-1/16" x 1/2" Interior Dimensions. These are single CD cardboard shipping boxes that fit a standard 10.4mm CD Jewel Case. The CD mailers are made from 200# test white facing cardboard. Extended sides ensure that the package is protected on all six sides. They features a lock-in tab to hold the box closed. These are perfect for shipping CD's safely and securely!